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Finding the Fourth Proportional to 108,559.40, 162,867.90 and 38,431.40

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Solution

The fourth proportional to 108,559.40, 162,867.90 and 38,431.40 is: 57,657.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,559.40 : 162,867.90 = 38,431.40 : x
  2. Step 2: Convert to fraction form
    108,559.40/162,867.90 = 38,431.40/x
  3. Step 3: Cross multiply
    108,559.40x = 162,867.90 × 38,431.40
  4. Step 4: Simplify right side
    108,559.40x = 6,259,241,412.06
  5. Step 5: Solve for x
    x = 6,259,241,412.06/108,559.40
  6. Step 6: Final answer
    x = 57,657.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.